class_docstr: Test material featurizers.
docstr: Test SCM featurizer.
docstr_tok: ["Test","SCM","featurizer","."]
code: def test_sine_coulomb_matrix(self):
      """
      Test SCM featurizer.
      """
  
      featurizer = SineCoulombMatrix(max_atoms=3)
      features = featurizer.featurize([self.struct_dict])
  
      assert len(features) == 1
      assert features.shape == (1, 3)
      assert np.isclose(features[0][0], 1244, atol=0.5)
  
file_path: deepchem/deepchem/feat/tests/test_materials_featurizers.py
imports: import unittest
  import numpy
  from deepchem.feat import ElementPropertyFingerprint, SineCoulombMatrix, CGCNNFeaturizer, ElemNetFeaturizer
label_desc: Use image node_id 3 for calling the TestMaterialFeaturizers obj's underlying member method code with example usage: obj.test_sine_coulomb_matrix() without return types